When gyms across the nation closed in response to the COVID-19 pandemic, exercise gurus suddenly found their regular fitness routines disrupted. But two BU sophomores decided to take advantage of new indoor workout regimes and become entrepreneurs.

As more companies begin specializing in the art of straight-to-your-front-door service, one company wants to do more than stand idly outside. Zeel wants to come in. An in-home massage service, Zeel...